Core-barrel for ingot-molds.



I J. P. BAGLEY.

CORE BARREL FOR INGOT MOLDS. I I APPLICAITION FILED MAY 8. 1914. 1,155,122. v PafentedSept. 28,1915.

2 SHEETS SHEE T II IIIIIIIIIIblI I I I 23 J: z;- 16 23 7 6 INVEgTUR B YVX I I I I [I D ATTORNEY.

J. P. BAGLEY.

COREIBARREL FOR INGOT MOLDS.

APPLICATION FILED MAY8.1914.

1,155, 1 Q2. Patented'Sept. '28, 1915.

. 7 2 SHEETS4SHEET 2. BIG- w V n F INVENTHR mensions of which are such that there is left between it and said core a casting space 20 of the size and form desired for the ingot mold 12 to be cast therein.

In casting, the molten metal rises into the casting space through a suitable passage, as

13, provided in a'core of sand or other refractory material which is seated in a channel 14 provided in a supporting base 15,

leading from the pouring column (not shown). Said base 15 constitutes a seat upon which 'rests the steel mold 11, as also therethrough, without binding, of the basefiange 3 of the gore arbor, as is clearly shown in Figs. 2 and 3. .With the base so constructed, the core is supported withthe base- 15 which is immediately adjacent to said flange of the arbor in said opening-16 and with its upper face flush with the top surface of that portion of the surrounding base opening. The supporting means may be of any appropriate character, but preferably consists of a sand layer 21 which rests upon the top of one or more wedge-like bars 23 a plate 22 mounted in said opening 16 upon which are directed horizontally through openings'provided therefor in the base 15,

I said plate 22 and said sand layer 21 being so' t upper end of the firmly seated outer 'mold adapted to. drop out of said opening'16 when said bars 23 are withdrawn" from supporting relation thereto. Supplementary to said supporting means a wedge 17 may be directed through a suitably located opening 18, rovided in the upper end of the arbor,

liat its opposite ends may rest upon the 11, as shown in Fig spl, 2 and 3.

When the casting 12 has solidified sufficiently and before appreciable shrinkage thereof has taken place, the supporting means is removed, whereupon the arbor 1 will either drop downward of its. own weight through said opening,:or may be causedfby a' blow applied to its upper end to drop therethrough, thus releasing the staves 4 and 5 and rendering them free to,

collapse or move inward from the sand core 10. p In practice, said staves, or some of them, may release themselves from said sandcore and drop through the opening 16 with the arbor; or, if not so released, their presence within the casting will in no way inter fere with the shrinkage of, or otherwise tend to damage, the casting, due to the fact that y the pressure resulting from such shrinkage,

acting upon said staves, readily collapses the .latter, such collapse being readily provided,

- jfor by the beveled forms of the interengaging surfaces of said staves.

In Fig. 6, wherein is illustrated a base 15 of modified form, a solid circumferentiall-y beveled seat .19 is provided in said base for the base-flange 3, the opening 16 of the preferred embodiment being omit-ted. When the base has this form, the entire molding apparatus, including the-casting 12, is bodily elevated from said base, and the core arbor is then either ejected while the apparatus remains suspended or after depositing the apparatus on its side on the foundry floor.

Irrespective of the manner of handling, however, when the 'core arbor has been ejected, the staves yield readily to external pressure, as the pressure due to the shrinkage of the casting, the staves, unobstructedly falling inward at their? upper ends, thus removing all bracing fsupport from the upper ends of'the staves 5 and permitting the latter to also fall inwardinto substantial encircling relation to said staves 4. As hereinbefore -indicated, this collapse of the staves is facilitated by the provision of the beveled surfaces thereon. So little resistance is ofiered by the staves that it frequently happens in actual practice that one or more thereof drop out with the arbor when the latter is ejected, much of the sand constituting the core 10 being also carried outward therewith. While'all of the staves may be removed promptly after the ejection of the arbor, it is not necessary to remove them until the casting has cooled and is ready to be cleaned for shipment.

-What is claimed is I 1. Av core barrel comprising a central member, and a plurality of staves surrounding and in 'interlockin relation with said member, allsaid staves having beveled. edges and being freely movable in an inward direc- '.tion when said central member has been ejected.

2. A core barrel comprising a central member, and two pairs of oppositely disposed staves embracing and interlocking with said member, one pair of said staves being seated against said member and the other pair thereof being seated against the one pair, the interengaging portions of said staves being beveled. a 3.'A core barrel comprising a central member, and a plurality of staves embracing memes movement thereof under external press fi're exerted by shrmkage of an encircling cisting.

5. A core barrel comprising a central member, and a plurality of staves disposed in inclosure-forming relation to said 'mem ber and separately attached to said member whereby the latter is locked except against movementin one direction only, said staves W. F KEEFER, 4 H. E. DUNLAP. 

